Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. Read More >

Current conditions at

Napa, Napa County Airport (KAPC)

Lat: 38.2075°NLon: 122.27944°WElev: 33.0ft.

Clear

48°F

9°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 15 Mar 02:30 AM PDT
Extended Forecast for

3 Miles NW Yountville CA

Heat Advisory March 16, 10:00am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  • Overnight

    Overnight: Mostly clear, with a low around 52. Calm wind.

    Low: 52 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. Calm wind becoming north northwest around 5 mph.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 92. Calm wind.

    High: 92 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 58. Calm wind.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 59.

    Low: 59 °F

    Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 52. Calm wind.
Sunday
Sunny, with a high near 87. Calm wind becoming north northwest around 5 mph.
Sunday Night
Mostly clear, with a low around 57. Calm wind.
Monday
Sunny, with a high near 92. Calm wind.
Monday Night
Clear, with a low around 58. Calm wind.
Tuesday
Sunny, with a high near 92.
Tuesday Night
Clear, with a low around 59.
Wednesday
Sunny, with a high near 92.
Wednesday Night
Clear, with a low around 59.
Thursday
Sunny, with a high near 93.
Thursday Night
Clear, with a low around 61.
Friday
Sunny, with a high near 95.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 88.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NW Yountville CA
 38.43°N 122.41°W (Elev. 180 ft)
2:40 am PDT Mar 15, 2026
2am PDT Mar 15, 2026-6pm PDT Mar 21, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database